hope you are talking about the SEPM server. During the install you would have been asked the password for login, use the same account to login to SEPM console.

Hello,

I think to what Pete has mentioned, when Installing the SEPM, the installation creates by default an username "admin" and you need to specify a password for SEPM.

For first time Login, you use the same username and password. Once Logged in, you can create Users inside the SEPM.

To create a user, check the steps below:

SEPM > Admin > Administrator

Hope that helps!!